drm/amd/display: Directly retrain link from debugfs

[why/how]
Skip logic that sets preffered link settings
and just retrain with new link_settings from Debugfs

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

@@ -34,6 +34,7 @@
 #include "resource.h"
 #include "dsc.h"
 #include "dc_link_dp.h"
+#include "link_hwss.h"
 #include "dc/dc_dmub_srv.h"
 
 struct dmub_debugfs_trace_header {
@@ -246,7 +247,6 @@ static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
 {
 	struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
 	struct dc_link *link = connector->dc_link;
-	struct dc *dc = (struct dc *)link->dc;
 	struct dc_link_settings prefer_link_settings;
 	char *wr_buf = NULL;
 	const uint32_t wr_buf_size = 40;
@@ -313,7 +313,7 @@ static ssize_t dp_link_settings_write(struct file *f, const char __user *buf,
 	prefer_link_settings.lane_count = param[0];
 	prefer_link_settings.link_rate = param[1];
 
-	dc_link_set_preferred_training_settings(dc, &prefer_link_settings, NULL, link, true);
+	dp_retrain_link_dp_test(link, &prefer_link_settings, false);
 
 	kfree(wr_buf);
 	return size;